Last week, I was invited to see a private preview screening of The Dark Knight Rises, three hours before the long-awaited midnight showings on July 20, 2012. The next morning, of course, I awoke to the news of a horrific shooting at one of those showings in Aurora, Colorado, in which 12 people were killed and nearly 60 were wounded, some critically. I have no idea how the movie figured into the gunman's plansif at allbut the event has certainly cast a pall over what would have otherwise been just another Hollywood mega-blockbuster opening.

The Games of the XXX Olympiad will begin in London, England, a week from today with what is sure to be a spectacular opening ceremony. And for the first time in Olympic history, a goodly portion of the entire two-week event will be available in high-definition 3D to subscribers of MVPDs (multichannel video programming distributors) reaching nearly 80 percent of US households.

Dave Duncan, Business Manager of DLP Cinema for Texas Instruments, explains the technology of Digital Light Processing, including the impossibly tiny moving mirrors on the surface of a Digital Micromirror Device (DMD) chip, 3-chip versus single-chip designs, and switching speed. Other topics include the transition from film to digital projection in commercial cinema, 2K versus 4K, 3D, high frame rates, alternative illumination sources such as lasers and LEDs, answers to chat-room questions, and more.

I recently read HT's review of the Panasonic TC-P55ST50 3D plasma TV. (Good review, by the way.) I noticed that the display was calibrated using a brightness range of 0-255. My understanding is that digital video (Blu-ray, DVD, digital TV) is encoded in YCbCr with a video brightness range of 16-235, and one should set the source component to output YCbCr and set the display to accept the brightness range of 16-235 to preserve the signal and avoid processing and interpolation. Just wanted to get your thoughts and reasons if one way is better than the other.

Live-sound pioneer and microphone maven Bob Heil returns to talk about his mic designs, new USB mic preamp/EQ, and headphones as well as his work with The Grateful Dead, The Who, Joe Walsh, and other rock legends, and his association with Paul Klipsch and organist George Wright, whose recordings helped launch the entire field of high-fidelity audio. Plus, answers to chat-room questions and more.

Is there a test disc with content that helps you dial in audio delay so the video and audio are in sync? My receiver and my Blu-ray player both have this adjustment, but it's very difficult to get it right just watching people talk. My old TV never had this issue, but my new Vizio TV seems to have an inherent delay. What do you advise as a solution?